A 7-month-old boy is seen by a specialist because of hypocalcemia,viral pneumonia,a history significant for recurrent diarrhea,and oral candidiasis.An x-ray reveals the lack of a thymic shadow.A likely diagnosis for this boy is:

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The combination of hypocalcemia, viral pneumonia, recurrent diarrhea, and oral candidiasis along with the lack of a thymic shadow on X-ray is suggestive of DiGeorge anomaly. This is a genetic disorder characterized by the partial or complete absence of the thymus gland, leading to T-cell deficiency and increased susceptibility to infections. Other features may also be present, such as congenital heart defects, facial abnormalities, and learning difficulties. Wiskott-Aldrich syndrome, ataxia telangiectasia, and bare lymphocyte syndrome do not typically present with these symptoms and physical findings.

A 7-Month-Old Boy Is Seen by a Specialist Because of Hypocalcemia,viral